Nothing really blends, just looks like alot of random things.
I'd work on the lighting and change up the colors.
I'd actually just re-do it all. I see just random things that dont even correspond besides with the word shapes

It's pretty messy and there's no good defining line between the edges of the shapes, and the background. Obviously there's a color difference, but that type of immediate change can be rough on a lot of people's eyes and it just looks strange.

The idea itself is something I really like though. It reminds me of one of my favorite old-school death metal albums of all time. Millenium by Monstrosity. Also reminds me of quite a few other old death and thrash metal albums, where the artists had that weird planetary abstract idea or style.

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It has potential but a lot of the elements need it be re evaluated and changed. Always feel free to keep messing with it, sometimes the best art comes from a lot of nothing!

This took your 45 minutes?!?!

I like the colors, it looks neat and cool.

I think it's unique, But could be better. I like it though good job man!

Blending the whole poster together is important, as the text "Shapes" looks as it simply doesn't belong, as well as other things. Fix the lighting and work on blending the layers together

Not a fan of the color scheme firstly, then comes the blending. 2D and 3D like this are hard to mix (I don't blame you for not getting it perfect, not many people I know can).

Work on the blending of 2D and 3D as well as fitting the overall elements into the product.